The TriplePlay does have a VST2 plugin titled "TriplePlay.dll". It's basically the same as the standalone app, but in a format your DAW can recognize. VST2 uses the file extension ".dll" (not ".vst"); VST3 uses the file extension ".vst3".
Anyway, it should be located in your default VST directory. I believe the FTP app's latest version (v1.5) is 64-bit only. On my pc, the default directory is "C:\Program Files\VstPlugins", but it could be in the Cakewalk directory, or wherever. If you don't know where your VST's are installed, then just do a Windows file search for "TriplePlay.dll". Then you can point Cakewalk to search that directory for plugins.
Like kurt said, I have a lot of issues using the TriplePlay software in Cakewalk as well. I haven't tried using it in hardware mode yet, but it may be the best option until someone gets the kinks worked out.